Dopa
Title: Dopa
CAS Name: 3-Hydroxytyrosine
Additional Names: 3-(3,4-dihydroxyphenyl)alanine; b-(3,4-dihydroxyphenyl)-a-alanine; 2-amino-3-(3,4-dihydroxyphenyl)propanoic acid
Molecular Formula: C9H11NO4
Molecular Weight: 197.19
Percent Composition: C 54.82%, H 5.62%, N 7.10%, O 32.45%
Literature References: An amino acid found in seedlings, pods and beans of Vicia faba L. (broad beans) Stizolobium deeringianum L. (velvet beans) Leguminosae: Torquati, Arch. farm. sper. 15, 213, 308 (1913), C.A. 7, 2774 (1913); Sealock, Biochemical Preparations vol. 1, 25 (1949). Absolute configuration: Guggenheim, Z. Physiol. Chem. 88, 276 (1913). Prepn of DL-, D-, and L-dopa: Yamada et al., Chem. Pharm. Bull. 10, 693 (1962).
 
Derivative Type: DL-Form
CAS Registry Number: 63-84-3
Properties: Prisms from water or from aq NaHSO3 soln, dec 270-272°. Soly in water: 144 mg/40 ml. Readily sol in dil acids and alkalies; slightly sol in benzene, carbon disulfide. Practically insol in abs alcohol, ether, glacial acetic acid, petr ether, chloroform. Oxidizes readily.
 
Derivative Type: D-Form
CAS Registry Number: 5796-17-8
Properties: Needles from water, dec 276-278°. [a]D11 +13.0° (c = 5.27 in 1N HCl). Soly in water: 66 mg/40 ml.
Optical Rotation: [a]D11 +13.0° (c = 5.27 in 1N HCl)
 
Derivative Type: L-Form see Levodopa

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